Module: Sequel::Plugins::ClassTableInheritance::ClassMethods
- Defined in:
- lib/sequel/plugins/class_table_inheritance.rb
Instance Attribute Summary collapse
-
#cti_instance_dataset ⇒ Object
readonly
The dataset that table instance datasets are based on.
-
#cti_models ⇒ Object
readonly
An array of each model in the inheritance hierarchy that uses an backed by a new table.
-
#cti_table_columns ⇒ Object
readonly
An array of column symbols for the backing database table, giving the columns to update in each backing database table.
-
#cti_table_map ⇒ Object
readonly
A hash with class name symbol keys and table name symbol values.
-
#cti_tables ⇒ Object
readonly
An array of table symbols that back this model.
Instance Method Summary collapse
-
#cti_base_model ⇒ Object
The parent/root/base model for this class table inheritance hierarchy.
-
#cti_columns ⇒ Object
Hash with table name symbol keys and arrays of column symbol values, giving the columns to update in each backing database table.
-
#cti_key ⇒ Object
Alias to sti_key, for backwards compatibility.
-
#cti_model_map ⇒ Object
Alias to sti_model_map, for backwards compatibility.
- #inherited(subclass) ⇒ Object
- #sti_class_from_key(key) ⇒ Object
-
#table_name ⇒ Object
The table name for the current model class’s main table.
Instance Attribute Details
#cti_instance_dataset ⇒ Object (readonly)
The dataset that table instance datasets are based on. Used for database modifications
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 201 def cti_instance_dataset @cti_instance_dataset end |
#cti_models ⇒ Object (readonly)
An array of each model in the inheritance hierarchy that uses an backed by a new table.
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 186 def cti_models @cti_models end |
#cti_table_columns ⇒ Object (readonly)
An array of column symbols for the backing database table, giving the columns to update in each backing database table.
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 197 def cti_table_columns @cti_table_columns end |
#cti_table_map ⇒ Object (readonly)
A hash with class name symbol keys and table name symbol values. Specified with the :table_map option to the plugin, and used if the implicit naming is incorrect.
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 211 def cti_table_map @cti_table_map end |
#cti_tables ⇒ Object (readonly)
An array of table symbols that back this model. The first is cti_base_model table symbol, and the last is the current model table symbol.
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 206 def cti_tables @cti_tables end |
Instance Method Details
#cti_base_model ⇒ Object
The parent/root/base model for this class table inheritance hierarchy. This is the only model in the hierarchy that loads the class_table_inheritance plugin. For backwards compatibility.
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 191 def cti_base_model @cti_models.first end |
#cti_columns ⇒ Object
Hash with table name symbol keys and arrays of column symbol values, giving the columns to update in each backing database table. For backwards compatibility.
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 216 def cti_columns h = {} cti_models.each { |m| h[m.table_name] = m.cti_table_columns } h end |
#cti_key ⇒ Object
Alias to sti_key, for backwards compatibility.
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 223 def cti_key; sti_key; end |
#cti_model_map ⇒ Object
Alias to sti_model_map, for backwards compatibility.
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 226 def cti_model_map; sti_model_map; end |
#inherited(subclass) ⇒ Object
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 230 def inherited(subclass) ds = sti_dataset # Prevent inherited in model/base.rb from setting the dataset subclass.instance_eval { @dataset = nil } super # Set table if this is a class table inheritance table = nil columns = nil if (n = subclass.name) && !n.empty? if table = cti_table_map[n.to_sym] columns = db.from(table).columns else table = subclass.implicit_table_name columns = db.from(table).columns rescue nil table = nil if !columns || columns.empty? end end table = nil if table && (table == table_name) return unless table pk = primary_key subclass.instance_eval do if cti_tables.length == 1 ds = ds.select(*self.columns.map{|cc| Sequel.qualify(table_name, Sequel.identifier(cc))}) end sel_app = (columns - [pk]).map{|cc| Sequel.qualify(table, Sequel.identifier(cc))} @sti_dataset = ds.join(table, pk=>pk).select_append(*sel_app) set_dataset(@sti_dataset) set_columns(self.columns) dataset.row_proc = lambda{|r| subclass.sti_load(r)} (columns - [pk]).each{|a| define_lazy_attribute_getter(a, :dataset=>dataset, :table=>table)} @cti_models += [self] @cti_tables += [table] @cti_table_columns = columns @cti_instance_dataset = db.from(table) cti_tables.reverse_each do |ct| db.schema(ct).each{|sk,v| db_schema[sk] = v} end end end |
#sti_class_from_key(key) ⇒ Object
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 282 def sti_class_from_key(key) sti_class(sti_model_map[key]) end |
#table_name ⇒ Object
The table name for the current model class’s main table.
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# File 'lib/sequel/plugins/class_table_inheritance.rb', line 278 def table_name cti_tables ? cti_tables.last : super end |